Improvement in steam-boilers



H EN RY W. ADAMS.

lmprovemen in Steam Boilers.

HENRY W. ADAMS, OE PHILADELPHIA, PENNSYLVANIA.

lMPROVENIENT IN STEAM-BOILERS.

Specification forming part of Letters Patent No. 123,437, dated February6, 1872.

Specification describing Improvements in Steam-Boilers, invented byHENRY W. ADAMS, of the city and county of Philadelphia and State ofPennsylvania.

Improvement in Locomotive-Boilers.

My invention consists of the combination, described hereafter, with alocomotive-boiler 'or with any boiler having horizontal tlues or tubes,of a supplementary steamgenerator for increasing the steam-generatingcapacity of the boiler 5 also, in devices for facilitating theemployment of a portion ofthe exhauststeam for war-min g the water inthe tank of the tender or other water-heater; the several features of myinvention being too fully explained hereafter to need preliminarydescription.

Figure l is a vertical section of my improved boiler, Fig. 2, atransverse vertical sect-ion on the line l 2, Fig. l; Fig. 3, asectional plan of the lire-box on the line 3 4, and Figs. 4 and,dctached views,drawn to an enlarged scale.

The re-box A and tubular body B of the boiler are of the usual shape andconstruction, but the smoke-box D is somewhat longer than in ordinaryboilers of this class. Immediately above this smoke-box and to the bodyB of the boiler is secured a vertical cylindrical shell, E, across whichextend the tube-plates a and b, and to the opposite ends of the latterare secured a series of vertical tubes, E, as shown in the drawing. Theshell E should be of sufcient diameter' to admit so many of these tubesthat their aggregate areas will be equal to that ofthe series of largerhorizontal tubes or flues in the main body of the boiler. Thecylindrical shell is mounted with a cap, d, having a central chimney, e,at or near the lower end of which terminates the upper end of theexhaust-pipe G, communicating with the exhaust-p orts of thecylindersthrough branches f f in the usual manner. The exhaust-pipe G is slightlycontracted at a2, so that the upper portion is less in area than thecombined areas ofthe branchpipes f f; hence, the passage of the exhauststeam will be somewhat retarded at this point, immediately below whichis a branch, y, communicating through a pipe, H, with the water-tank ofthe tender, or other reservoir containing water. The free escape of theexhaust steam, therefore, is not impeded by throttling the pipe at forthe pipe H affords a sufficient channel for the escape of a portion ofthe exhaust steam which is imA pelled through the pipe G bytheinterruption in the pipe H, and which is utilized by causing it to warmthefeed-water.

IVatcr is fed into the shell E through a pipe, K, and overflows into themain boilerI through a pipe, I. The shell E with its tubes, in fact,form a supplementary generator, the steam-space ot' which is connectedwith that of the main boiler through `the medium of the pipe J. In frontof the iire-box, and directly opposite the ends of the horizontal tubesof the main body ofthe boiler, I make two openings, L, and into eachopening is projected a jet of live steam from a tube, i', communicatingwith the steam-space of the boiler, the tube being less in diameter thanthe hole h in the lire-box, so that with the jet of steam a volume ofair must be projected into the tireboX, and the combined air and steamserves the twofold purpose of increasing the heat derived from theproducts of combustion and of disintegrating, to a considerable extent,the particles of fuel which in ordinary locomotiveboilers are drawnthrough the tubes.

Although my invention is especially applicable to locomotive-boilers itmay be applied to any boilers of a like class, such, for instance, asthose used for portable engines.

I do not here claim the introduction of gas and air into the furnace, asdescribed, as this will form the subject of. another application forLetters Patent 5 but I claiml. A steamgenerator, consisting of theboiler B, the combustion-chamber D, and the boiler E, the lattercommunicating by apipe or pipes with the boiler B, and having verticaltlues communicating with the combustion-chamber, all substantially asdescribed.

2. The combination of the subject-matter of the first claim, the chimneye, central exhaustpipe Gr, extending from the combustion-chamber intothe chimney and contracted at the part m, substantially as and for thepurpose speciied.

In testimony whereof I have signed myname to this specification in thepresence of two subscribing witnesses.

Witnesses: HENRY W. ADAMS.

WM. A. STEEL, J OHN K. RUPERTUS.

